MESOSCALE DISCUSSION 1566
   NWS STORM PREDICTION CENTER NORMAN OK
   1027 PM CDT SUN JUL 10 2011
   
   AREAS AFFECTED...CNTRL/ERN NEB...WRN IA...EXTREME SERN SD
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 619...
   
   VALID 110327Z - 110430Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 619
   CONTINUES.
   
   A NWD PROPAGATING MCS HAS EVOLVED OVER SCNTRL NEB THIS EVENING...
   ENHANCED BY AN INCREASING H9-H85 SLY LLJ AND EFFICIENT COLD POOL
   GENERATION.  MODELS PROG NOSE OF THE LLJ AND BULK OF MASS
   CONVERGENCE ACROSS ERN NEB AND WRN IA THROUGH 09Z.  ALTHOUGH
   MODIFICATION OF THE 00Z OAX SOUNDING SUGGESTED INCREASED INHIBITION
   DOWNSTREAM FROM THE STORMS...PLENTY OF MUCAPE EXISTS TO SUPPORT
   CONTINUED STORM PROPAGATION/SUSTENANCE.  QUESTION REMAINS IF STORMS
   WILL MAINTAIN SFC-BASED CHARACTER OR BECOME MORE ELEVATED WITH TIME.
    DRY LAYER BETWEEN H85-H7 MAY AUGMENT DOWNDRAFT PRODUCTION WHATEVER
   THE CASE...YIELDING AT LEAST ISOLD WIND DAMAGE POTENTIAL.
   
   A WW IS BEING CONSIDERED ACROSS ERN NEB AND PERHAPS WRN IA/EXTREME
   SERN SD.
   
   ..RACY.. 07/11/2011
   
   
   ATTN...WFO...DMX...FSD...OAX...GID...LBF...
   
   LAT...LON   41110032 42029869 43149686 43129593 42749556 42059570
               41599571 41109644 40699760 40759874 40889962 41110032